Spa chair



FIG. 1 is a top perspective view of a spa chair showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side view thereof, the right side being identical; and,

FIG. 4 is a front view thereof, the rear being identical.

The broken lines are for illustrative purposes only and form no part ofthe claimed design.

I claim the ornamental design for a spa chair, as shown and described.